Total forward and differential cross sections of neutral D mesons produced in 500 GeV/c π--nucleon interactions

被引：16

作者：

Aitala, EM ^{[1
]}

Amato, S

Anjos, JC

Appel, JA

Ashery, D

Banerjee, S

Bediaga, I

Blaylock, G

Bracker, SB

Burchat, PR

Burnstein, RA

Carter, T

Carvalho, HS

Copty, NK

Cremaldi, LM

Darling, C

Denisenko, K

Devmal, S

Fernandez, A

Fox, GF

Gagnon, P

Gobel, C

Gounder, K

Halling, AM

Herrera, G

Hurvits, G

James, C

Kasper, PA

Kwan, S

Langs, DC

Leslie, J

Lundberg, B

Magnin, J

MayTal-Beck, S

Meadows, B

Neto, JRTD

Mihalcea, D

Milburn, RH

de Miranda, JM

Napier, A

Nguyen, A

d'Oliveira, AB

O'Shaughnessy, K

Peng, KC

Perera, LP

Purohit, MV

Quinn, B

Radeztsky, S

Rafatian, A

Reay, NW

机构：

[1] Univ Mississippi, University, MS 38677 USA

[2] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[3] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA

[4] Univ Cincinnati, Cincinnati, OH 45221 USA

[5] CINVESTAV, Mexico City 07000, DF, Mexico

[6] Fermilab Astrophys Ctr, Batavia, IL 60510 USA

[7] IIT, Chicago, IL 60616 USA

[8] Kansas State Univ, Manhattan, KS 66506 USA

[9] Univ Massachusetts, Amherst, MA 01003 USA

[10] Princeton Univ, Princeton, NJ 08544 USA

[11] Univ Autonoma Puebla, Mexico City, DF, Mexico

[12] Univ S Carolina, Columbia, SC 29208 USA

[13] Stanford Univ, Stanford, CA 94305 USA

[14] Tel Aviv Univ, IL-69978 Tel Aviv, Israel

[15] Tufts Univ, Medford, MA 02155 USA

[16] Univ Wisconsin, Madison, WI 53706 USA

[17] Yale Univ, New Haven, CT 06511 USA

来源：

PHYSICS LETTERS B | 1999年 / 462卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(99)00900-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We measure the neutral D total forward cross section and the differential cross sections as functions of Feynman-x (x(F)) and transverse momentum squared for 500 GeV/c pi(+)-nucleon interactions. The results are obtained from 88990 +/- 460 reconstructed neutral D mesons from Fermilab experiment E791 using the decay channels D-0-->K(-)pi(+) and D-0-->K(-)pi(+)pi(-)pi(+) (and charge conjugates). We extract fit parameters from the differential cross sections and provide the first direct measurement of the turnover point in the x(F) distribution, 0.0131 +/- 0.0038. We measure an absolute D-0 + (D) over bar(0) (x(F) > 0) cross section of 15.4(-2.3)(+1.8) mu barn/nucleon (assuming a linear A dependence). The differential and total forward cross sections are compared to theoretical predictions and to results of previous experiments. (C) 1999 Published by EIsevier Science B.V. All rights reserved.

引用

页码：225 / 236

页数：12

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